水中矩形悬臂梁湿频率的试验与数值识别
Experimental and Numerical Identification of Wet Frequencies for Rectangular-Section Cantilever Beam in Water
摘要:
本文研究了水中矩形悬臂梁的自由弯曲振动固有频率，设计了水中的悬臂梁试验模型，得到了不同试验情况下矩形悬臂梁入水固有频率的试验结果，采用ANSYS有限元软件对该试验模型进行了模态分析，将试验结果和ANSYS计算结果进行了比较分析，数值计算结果与试验值总体吻合良好，结果表明一阶固有频率随悬臂梁入水深度的增加而降低。
Abstract:
This paper studies the free bending vibration frequency of rectangular cantilever beam in water. The test model (a cantilever beam in water) is designed, and the natural frequencies of different cases of the rectangular cantilever beam in the water are obtained. The finite element method (ANSYS code) is used for modal analysis of the test model. The test results and FEM results are compared and analyzed. The numerical results agree well with the experimental values. It is showed that the natural frequency of a cantilever beam reduces with the increase of the water depth.
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